The magnetic moments associated with... |JEE Main 2023 | EMI

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JEE MAIN 2023

30-01-2023 S1

Question

The magnetic moments associated with two closely wound circular coils $A$ and $B$ of radius $\mathrm{rA}=10 \mathrm{~cm}$ and $\mathrm{CB}_{\mathrm{B}}=20 \mathrm{~cm}$ respectively are equal if. (Where $\mathrm{N}_{\mathrm{A}}, \mathrm{I}_{\mathrm{A}}$ and $\mathrm{N}_{\mathrm{B}}$, IB are number of turn and current of A and $B$ respectively)

Select the correct option:

A

2NAIA = NBIB

B

NA = 2NB

C

NAIA = 4NBIB

D

4NAIA = NBIB

✓ Correct! Well done.

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Solution

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